This leveled armor is most helpful to assassins; for additional boosts, wear a complete set of Nightingale Armor, along with Boots (Muffle), Gloves (better Lockpicking and One-Handed), and Hood (Illusion costs less magicka)

Deathbrand Armor (Light): Full Set

Enchantment: Increases your Stamina by 15 for each Deathbrand item you wear

Location: Complete Solstheim Side Quest: Deathbrand

Wear this as a set for better-than Daedric Armor, along with Boots (increased carry capacity), Gauntlets (better Dual-wielding), and Helm (Waterbreathing, +100 Armor when worn as a set)

Dragonscale Armor (Light): Full Set

Enchantment: Armor 41, Weight 10

Location: Randomly found, crafted, or bought

If you’re using Light Armor, and you’re at the pinnacle of Smithing and Enchanting, the very best armor available to you is Dragonscale

Miraak’s Robes (Light): Full Set

Enchantment: Absorb 15% of the magicka from Dragon Breath and spells. Chance on hit to spawn a tentacle explosion